diff --git a/style.css b/style.css
index 7ba21e1..eb09ce1 100644
--- a/style.css
+++ b/style.css
@@ -16,5 +16,8 @@
 	height: 24px;
 }
 #formatter img:hover {
-	background: #e6e6e6;
+	background-color: #e6e6e6;
+}
+#formatter img:active {
+	background-color: #c9c9c9;
 }